<!DOCTYPE html>
        <html lang="en">
        <head>
        	<meta charset="UTF-8">
        	<title>Document</title>
        </head>
        <body>
        	<table border="1" width="500px" cellspacing="0" cellpadding="5px" 
                       align="center">
        		<caption>前端工程师平均工资</caption>
			<thead>
        		<tr>
        			<th rowspan="2">城市</th>
        			<th colspan="2">2014</th>
				<th rowspan="2">2015</th>
				<th rowspan="2">2016</th>
        		</tr>	
        		<tr>
        			
        			<th>上半年</th>
        			<th>下半年</th>
        		</tr>	
        		</thead>
        		<tbody>
        		<tr>
        			<td>北京</td>
        			<td>8000</td>
        			<td>9000</td>
				<td>10000</td>
				<td>12000</td>
        		</tr>	
        		<tr>
        			<td>上海</td>
        			<td>6000</td>
        			<td>7000</td>
				<td>8000</td>
				<td>10000</td>
        		</tr>	

        		</tbody>
        		<tfoot>
        		<tr>
        			<td>合计</td>
        			<td>7000</td>
        			<td>8000</td>
				<td>9000</td>
				<td>11000</td>
        		</tr>	
        	</tfoot>
        	</table>

        </body>
        </html>        
